Punch-holder for heading and upsetting machines.



B. TJNOBLE. HEADING AND UPSETTING MACHINES.

APPLlCATION FILED FEB. 28 1916. 1,1 91 ,721.

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Patented July 18, 1916.

B. T. NOBLE.

PUNCH HOLDER run HEADING AND UPSETTINQ MACHINES.

'1 APPLICATION FILED FEB. 28. 1915.

I Patented July 18, 1916.

2 SHEET$-SHEET 2.

BOUGHTQN T. NOBLE, QF PLANTSVI'LLE', CONNECTICUT.

rUNoH-HQLDEB. FOR HEADING AND. ursn'rrrue MACHINES.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed. February 28, 1916. Serial No. 80,869.

To all whom it may concern:

Be it known that I, Bouen'ron T. NOBLE, a citizen of the United States, residing at Plantsville, in the county of Hartford and State of Connecticut, have invented anew and useful Improvement in Punch-Holders for Heading and Upsetting Machines; and I do hereby declare the following, when taken in connection with the accompanying drawings and .the characters, of reference marked thereon, to. be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Figure 1 a side view' of a punch holder for heading or upsetting machines con structed in accordance with my invention. Fig. 2 an underside View of the same. Fig. 3 a longitudinal sectional view. Fig. 4 a side view of the sliding punch, detached. Fig. 5 a side view of the punch pin, detached. Fig. 6 an underside view of the head with punches and springs removed.

This invention relates to an improvement in punch holders for heading and upsetting machines.

In machines for heading and upsetting metal, two punches are usually employed, one to upset the metal, and the other to finish it. In upsetting metal as in heading bolts, it is necessary to throw out a suflicient amount of metal between the ends of the blank to form the head, but if the head is to be of comparatively large size as compared to the shank of the bolt, difficulty 1s experienced in supporting the stock so as to prevent buckling; To overcome this, upsetting machines have been devised to perform three or four operations instead of two.

The object of this invention is to provide a punch holder and punch for heading machines by which a comparatively large amount of metal may be thrown out from the stock at a single operation, so that the article can be completed by the finishing punch; and the invention consists in the construction hereinafter described and particularly recited in the claims.

In carrying out my invention I employ the usual head-block 2 which is formed in its face 3 with two cylindrical chambers ft, 5. In the bottom of the chamber a is a recess 6 to receive a disk 7 of hardened steel for the purpose as will hereinafter appear, and from this recess 6 and opening through the head 2, is a channel 8 by which the disk may be forced out of the recess 6 if necessary 1n the bottom of the chamber 4. I also form two, sockets 9, 10, to receive; springs .11 and 12,.for the purpose as will hereinwith a head 14: adapted to. rest upon the disk 7. The end of this pin projects slightly beyond the face 3 of the block. The'sl'ide 15 enters the chamber at and sets over the pin '13. The sliding punch 15 smaller in diameter thanjthe diameter of the chamber 1 is formed with ahead 16 corresponding in diameter to the diameter of the chamber 4. Extending longitudinally through the sliding punch is a passage 17 corresponding to the diameter of the pin 13 which is adapted to enter it, and at the outer end this passage 1s enlarged to form a tapered upsetting space 18 corresponding indimensions to the amount of metal to be thrown out from the stock. At the inner end of the passage 17 is a clearance space 19 around the head 14L of the pin 13. Entered into the springs 11 and 12 are plungers 20 and 21 formed respectively with heads 22 and 23 against which the ends of the springs rest, and which heads bear against the head 16 of the sliding punch. After the punch has been entered into the chamber 4 a collar 24 is passed over the sliding punch and entered into the open end of the chamber 4 in which it is held by screws 25 and 26, thus preventing the withdrawal of the sliding punch 15 and permitting it to move longitudinally. In the chamber 5 is located a finishing punch 27 of usual construction. A strip 28 of-stock to be headed or upset is held 1n the usual manner so that the sliding punch can pass over its end until the end of the pin 13 strikes the end of the stock and as the pin continues its movement the sliding punch moves into the chamber 4L allowing a portion of the metal between the ends to be thrown out into the upsetting s ace 18 so as tofill that space and upset su 'cient metal to form.

operation was not changed in form being used with the previously upset portion to form the finished head. By thus supporting the end of the stock during the upsetting operation all buckling is prevented, and consequently more stock can be thrown out than has been possible with a single punch.

I claim 1. A punch holder for heading or upsetting machines formed with a chamber, a pin located in said chamber, a sliding punch extending into said chamber and formed with a passage for the clearance of the said pin, and with a tapered upsetting space at its outer end, means for holding the sliding punch in the head, and means for forcing said sliding punch outward.

2. A punch holder for heading or upsetting machines comprising a punch chamber,

a recess in the bottom of said chamber, a

disk mounted in said recess, a headed pin the head of which rests on said disk, a sliding punch extending into said chamber and formed with a passage for the clearance of said pin, said sliding punch also formed with a tapered upsetting space at its outer end around said pin passage, means for holding the sliding punch in the head, and means for forcing said sliding punch outward.

3. A punch holder for heading or upsetting machines comprising a punch chamber, a recess in the bottom of said chamber, a disk mounted in said recess, a headed pin the head of which rests on said disk, a sliding punch smaller in diameter than the diameter of said chamber and formed with a head corresponding in diameter to the diameter of the said chamber, said sliding punch formed with a longitudinal passage correspondmg 1n diameter to the diameter of the pin over which it passes, said sliding punch formed in its outer end with an upsetting space, a collar around said punch and locked in said chamber, and springs adapted to force said sliding punch outward.

BOUGHTON T. NOBLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

7 Washington, I). C. 

